Parts Needed to Convert a Tandem Axle Boat Trailer to Electric Brakes
Updated 10/27/2025 | Published 03/18/2025
Products Featured in This Question
Question:
Marine trailer electric brakes: I have a Trailers Inc trailer with surge brakes. Im considering upgrading to electric. I did review your parts but wondering if you can tell me if you have the necessary equipment to convert my trailer. Its a tandem axle but with brakes on one axle. Trailer tag lists model as SC-38. Load capacity 3800lb. Mfg Trailers Inc. 1986. Thankyou.
asked by: Jim B
Expert Reply:
Hey Jim! We have all the parts necessary to convert your trailer over to electric brakes. I do need some additional information from you though. I wasn't able to pull any part numbers or specifics from your trailer's model number and I'll need to know what lug pattern your hubs have and the size of the spindle.
I have listed the rest of the parts you'll need below but I need you to pull one of your hubs and check the part numbers on the bearings and give me your lug nut pattern. If your bearings don't have part numbers you'll need to use a digital caliper like item # PTW80157 to measure area's C and D on the diagram attached below.
Trailer Wiring 7-Way Upgrade Kit item # ET7WK
Bright Way Push-to-Test Trailer Breakaway Kit item # 3802308
10 Gauge Wire - Blue Primary - Per Foot item # 10-1-1
Deka Heat Shrink Butt Connector - 12-10 Gauge - Nylon Insulation item # DW05745-10
etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies item # AKEBRK-35-SA
(click to enlarge)
Product Page this Question was Asked From
Bright Way Push-to-Test Trailer Breakaway Kit with 1-Amp Charger and 5 Ah Battery - Top Load
- Trailer Breakaway Kit
- Kit with Charger
- Top Load
- Single-Axle
- Tandem-Axle
- Push-to-Test
- Electric
- Battery Included
- 5 Ah
- 48 Inch Long
- Bright Way
more information >
Continue Researching
- Video: Trailer Wiring 7-Way Upgrade Kit Feature Review
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Replacement 7-Way and Trailer Light Wiring for a 32' Gooseneck Trailer
- Shop: Pollak 4-Way Flat Trailer Connector with 24" Harness
- Shop: Pollak 4-Way Flat Trailer Connector with 5' Harness
- Q&A: Mounting Hole Spacing from Top of Demco Channel Tongue Trailer Coupler DM13203-95
- Shop: Hopkins 7-Way Blade Style Connector with Molded Cable - Trailer End - 8' Long - Auto Standard
- Shop: Trailer Wiring 7-Way Upgrade Kit
- Shop: Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48"
- Shop: NOCO GEN On-Board Battery Charger - AC to DC - Waterproof - 3 Bank - 12V - 15 Amp
- Shop: 4" Carbon Fiber Digital Caliper
- Article: Trailer Wiring Diagrams
- Article: Breakaway Kit Installation for Single and Dual Brake Axle Trailers
- Q&A: Does the Lid Open All the Way on the Bright Way Push-to-Test Trailer Breakaway Kit When Mounted?
- Q&A: Recommended Kit to Convert Brinkley Z3100 from Drum to Disc Brakes
- Article: Parts Needed to Add Electric Drum Brakes to a Trailer
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Lighting Requirements
- Q&A: Instructions to Wire a Trailer for Electric Brakes
- Q&A: Can 10 x 2-1/4 Drum and Brakes Replace 10 x 2-1/2 Drum on Trailer
- Q&A: Can I Add Electric Brakes To A 1993 EZ Loader Boat Trailer
- Article: How to Measure Your Trailer Wheel Bolt Pattern
Jerred H.
10/27/2025
Hey Jim, were you able to check your hub bearings and lug pattern for the electric brake conversion on your trailer? Once you have those details, I can help confirm the right parts for your setup. Let me know what you find so we can get you squared away.